Sprite white out

This seems to have been asked before. But I need a method for Opengl iphone 1.1 i.e. works on a 3g.
I simply wish to draw any sprite with a complete white frame. I haven't got the ram to store every possible animated frame in white aswell.
My only current (and rubbish!) solution is to draw the sprite I require white multiple times with glBlendFunc( GL_SRC_ALPHA, GL_ONE );

Yeah, I know!. But it works!!! :-)
I *assume* there's a much better (more efficient) way to simply draw a white frame rather than multiple draws.

It works fine with OpenGL 1.1. Texture combiners are generally a giant pain to set up. Though if all you want to do is output a constant color that is probably not so bad. Maybe only like 10 lines of code? I don't really remember.

Normally you would use GL_MODULATE as your texture ENV mode which multiplies the vertex color against the texture color. You could use GL_ADD instead, but this would only work with specifically 100% white. You wouldn't be able to flash it any other color.